Non-chromatographic speciation of arsenic by successive dispersive liquidliquid microextraction and in situ formation of an ionic liquid in water samples

Vicente Martínez, Yésica

Publication:
Non-chromatographic speciation of arsenic by successive dispersive liquidliquid microextraction and in situ formation of an ionic liquid in water samples

dc.contributor	Caravaca, Manuel
dc.contributor	Soto Meca, Antonio
dc.contributor.author	Vicente Martínez, Yésica
dc.contributor.department	Química Analítica
dc.date.accessioned	2025-01-17T12:01:42Z
dc.date.available	2025-01-17T12:01:42Z
dc.date.issued	2020-05-30
dc.description	https://doi.org/10.1016/j.microc.2020.105102
dc.description	© 2020 Elsevier Ltd. This document is the published version of a published work that appeared in final form in Microchemical Journal To access the final edited and published work see: https://doi.org/10.1016/j.microc.2020.105102
dc.description.abstract	Arsenic is an element present in waters in its different species which can cause a serious risk to human health due to the consumption of these waters. However, the toxicity of each species is very different. Because of that, in analytical chemistry there is a great interest in developing methods that allow the quantification of low concentrations and speciation of arsenic. Accordingly, this work introduces a novel method applied to determine very low concentrations of arsenic species (As (III), As (V), monomethylarsonic acid (MA), dimethylarsinic acid (DMA) and arsenobetaine (AB)) in water samples. The procedure provides high enrichment factors and great sensitivity in a simple and non-chromatographic way using electrothermal atomic absorption spectrometry. The in-situ formation of an ionic liquid (IL) results in a dispersion through the formation of a cloud of IL droplets that allows the instantaneous extraction of the arsenic species. After centrifugation, they can be quantified by direct injection of the extract (IL+arsenic species) into the detector. The different experimental conditions such as pH and the use of complexing agents allow the selective extraction of each species. An enrichment factor of 295 is obtained by using this procedure. Additionally, high sensitivity and a low detection limit (0.02 μg L−1) for all species are achieved, enabling the method as an alternative for the chromatographic techniques.
dc.embargo.terms	Si
dc.format	application/pdf	es
dc.format.extent	6	es
dc.identifier.citation	Microchemical Journal, 157, 105102 (2020)
dc.identifier.issn	Print.: 0026-265X
dc.identifier.issn	Electronic.: 1095-9149
dc.identifier.uri	http://hdl.handle.net/10201/148687
dc.language	eng	es
dc.publisher	Elsevier
dc.relation	Sin financiación externa a la universidad	es
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S0026265X20315745
dc.rights	info:eu-repo/semantics/embargoedAccess	es
dc.subject	Dispersive liquid-liquid microextraction	es
dc.subject	Arsenic species
dc.subject	Speciation
dc.subject	Trace concentrations
dc.subject	Ionic liquid
dc.title	Non-chromatographic speciation of arsenic by successive dispersive liquidliquid microextraction and in situ formation of an ionic liquid in water samples	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es